Behavioural indices of responses to reversed contingency. (A) Total trials to response contingency in each reversal phase (control: left side, LKM + Arg: right side). Each value represents the total number of trials where the minimum of diagonal behavioural indices (cumulative diagonal corrects − cumulative diagonal errors) was last detected in each reversal phase. The first reversal phase, second reversal phase, third reversal phase and fourth reversal phase are presented as Rev. 1, Rev. 2, Rev. 3 and Rev. 4, respectively. The value gradually decreased over repeating reversal phases in both groups. Each horizontal line and error bar represent the mean and SEM of each group, and each circle represents individual mouse data (LKM + Arg: n = 11, control: n = 12 at Rev. 1; LKM + Arg: n = 10, control: n = 12 at Rev. 2; and LKM + Arg: n = 5, control: n = 6 at Rev. 3 and Rev. 4). (B) Curves of diagonal behavioural indices within the first 150 trials in each reversal phase. Horizontal dotted lines represent zero value. Each circle and error bar represent the mean and SEM of each group (LKM + Arg: n = 11, control: n = 12 at Rev. 1; LKM + Arg: n = 10, control: n = 12 at Rev. 2; and LKM + Arg: n = 5, control: n = 6 at Rev. 3 and Rev. 4).